Burner for incandescent lamps.



L. PELLBERG. BURNER FOR INGANDBSGENT LAMPS.

APPLICATION FILED JULY 9,1908.

Patented Aug. 3, 1909.

50 inside the cone and directly around the upper .UNITED sTATEs PATENT oEEroE.

.LOUIS FELLBEEG, or RDrDoRF, NEAR` BERLIN, GERMANY. i

l:BURNER FOR INCANDESCENT LAMPS.

Srpecication of Letters Patent.

Patented Aug. 3, 1909.

Aptucaaon meamy 9, 190s. serial No. 442,688. l

descent lamps, the admission anddistribution of the air'being so favorably arranged of the arrows.

that the settling of oily substancesnear the wick is' entirely avoided. .Thus a perfect combustion of the oil as well as a high luminous effect is realized.

i In the drawingsz' Figure 1 is a side eleva-- tion, partly in section, 'of a lamp embodying the principles of my invention; Fig. 2 is an' enlarged partial sectional view of the-same, showing details of the burner. ..f

'Vertically' upward through the center of the oil reservoir a of the lamp there passes an air admission tube b the air streaming into it from the base c of the lamp in the direction For this mr provided with air inlets eneath the air admission tube b I provide a cay @having a closed bottom-face and side wa perforated to producey air inlets f. pose of this cap is to prevent the alrl om streaming straight upwardly to the top of thev burner, the arrangement of the o enings f causing the air to be forced toward t e center ofthe tube/Z3. Cap e isv preferably punched from sheet metal Wlth vertical slots .s extendf through the perforations o ing inward from its upper edge so as tomake it flexible and enable 1t, to be sustained y the sp g tension in its proper position .as shown in Fig.' 1. Y

\ The burner cap h is mounted on the .per-l forated cylinder t which is in turn supported" from the frame a of the lam Thealr passes fpthe cylinder t and from thence upwardly through a plurality of paths. The burner c ap has a perforated conical portion Z' through which p'artof the current of air passes, a small quantity passing edges of the wick.' The conical sieve lhas an- Aoutwardly and upwardly directed d ange m at its upper small end and which is also erforated with o enings n. The air w ch passes through t e conical sieve Zdivides into ose the base iswhich are The ur-` and around the outside surface ofthe flange m. The latter current is directed inward by a hood .7c with aflat surface directly above` 'cated substantiall in the central opening of the hood Ic. Wit the mantle and at the upper end of the tube 'b there is provided a ,perforated thimble o through the openings of which air from the tube b streams outward;

This current meets the various streams of air passing within and through the conical sieve as already described.

portions which pass through-the. openings n' An anaysis of the foregoing will show that above; every point of the wick there play a plurality of se arate streams or currents of air, all directe so as to produce the most efficient combustion, One current which asses within the sieve liiows directly across t e upper edge ofthe wick, producing proper comustion thereat and reventing oily and sooty deposits. This a1r from this 'source is,

yso

however, not alone sufficient to produce a` blue flame. The various other air currents creased e evations, furnish the means of creating the intensely hot blue iiame Whichis vreruired for an incandescent mantle. f

t may be observed that in an .oil lamp a certain air pressure or air moving force is created by the chimne draft, but` the amount of air which can e set in rapid mo' tion from. this cause is limited. If too lar e .impingin on the flame at successively in` openingsimproperly arranged anddistri uted'are provided, the eciency of the chimneydraftgas a` means of producing airpressure, is cut down. Accordingly-'it is neces-` sary to be economicalinfthe size and in the arrangement of the varlous air openings so that `very minute streams of air shall have 'an appreciable pressure due to the 'chimney' draft to force each against. the flame in a defievery one of which is arranged to do its 'workmost effectively and which are so distributed that a substantial air pressure'is present to rentof. air vwould. .flow uselessly upward ',throughthe center tube b, cutting vdown the effective suction of the chimney draft so that practically no air would enter within and f 'roo nite stream. This is the purpose of my inl Yention, namely to have a number of streams .and partly through and aroun n l 0 Ja l l v A l around the `conical sleve l. M invention.

therefore may be said to lie in t e arrangeneydraft ava' able. What I claim is:'

1. In a burner for incandescent lamps, a4 `cylindrical wick, a perforated thimble supported to projectV upward from within said Wick, and a conical sieve outside the wick,

said sieve having an upwardly and outwardly directe'drllange at its upper end, and located to divide an air current to pass (partly within the sieve. 2..In a burner for incandescent lamps, a

cylindrical wick,'a perforated thimble supported to"project u ward from within the same, and a conica sieve surrounding the wick and having an u wardly and outwardly directedperforated. ange at its'upper end, whereby a current of air is divided 1nto three streams', one of which passes wholly Within said sieve, one of which asses through said flange, and another of W 'ch passes around said 'ange. Y

In testimony Awhereof Il have signed my name to this specicationin the'prese'nce of two subscribing witnesses. p

' N `LOUIS, FELLBERG.

I'Vitnesss:

HENRY HASPER,

, .WOLDEMAR HAUPT, 

